| Line 62... |
Line 62... |
CPU_EXTENSION_RISCV_U : boolean := false; -- implement user mode extension?
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CPU_EXTENSION_RISCV_U : boolean := false; -- implement user mode extension?
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CPU_EXTENSION_RISCV_Zicsr : boolean := true; -- implement CSR system?
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CPU_EXTENSION_RISCV_Zicsr : boolean := true; -- implement CSR system?
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CPU_EXTENSION_RISCV_Zifencei : boolean := true; -- implement instruction stream sync.?
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CPU_EXTENSION_RISCV_Zifencei : boolean := true; -- implement instruction stream sync.?
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-- Extension Options --
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-- Extension Options --
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FAST_MUL_EN : boolean := false; -- use DSPs for M extension's multiplier
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FAST_MUL_EN : boolean := false; -- use DSPs for M extension's multiplier
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FAST_SHIFT_EN : boolean := false; -- use barrel shifter for shift operations
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-- Physical Memory Protection (PMP) --
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-- Physical Memory Protection (PMP) --
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PMP_USE : boolean := false; -- implement PMP?
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PMP_USE : boolean := false; -- implement PMP?
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PMP_NUM_REGIONS : natural := 4; -- number of regions (max 8)
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PMP_NUM_REGIONS : natural := 4; -- number of regions (max 8)
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PMP_GRANULARITY : natural := 14 -- minimal region granularity (1=8B, 2=16B, 3=32B, ...) default is 64k
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PMP_GRANULARITY : natural := 14 -- minimal region granularity (1=8B, 2=16B, 3=32B, ...) default is 64k
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);
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);
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| Line 241... |
Line 242... |
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-- ALU ------------------------------------------------------------------------------------
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-- ALU ------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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neorv32_cpu_alu_inst: neorv32_cpu_alu
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neorv32_cpu_alu_inst: neorv32_cpu_alu
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generic map (
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generic map (
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CPU_EXTENSION_RISCV_M => CPU_EXTENSION_RISCV_M -- implement muld/div extension?
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CPU_EXTENSION_RISCV_M => CPU_EXTENSION_RISCV_M, -- implement muld/div extension?
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FAST_SHIFT_EN => FAST_SHIFT_EN -- use barrel shifter for shift operations
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)
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)
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port map (
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port map (
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-- global control --
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-- global control --
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clk_i => clk_i, -- global clock, rising edge
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clk_i => clk_i, -- global clock, rising edge
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rstn_i => rstn_i, -- global reset, low-active, async
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rstn_i => rstn_i, -- global reset, low-active, async
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